Tesla Tops S&P 500. Was It Cybercab Buzz, Or Elon Musk's New FSD Tease?

Tesla stock shot to the top of the S&P 500 on Monday. Shares rose more than 5% over the course of the day, according to MarketSurge. There was no immediate catalyst for the stock. However, a series of developments over the weekend may have been responsible for the rally. CEO Elon Musk made comments about future updates to Tesla’s self-driving…